Official bass guitar sheets are usually flawed. Jason was a big influence of mine and it seems to me that with the exception of the AJFA recording, he stood out both tonewise and skillwise. At first glance his work doesn't seem to be special but if you look at what everyone else was playing at the time, it's ground-breaking. Where most guys were playing root notes and standard rhythm parts, he threw in some funk and jazz licks but still stayed in the pocket. He wasn't much of a lead-style bassist like Entwhistle, Butler, or Burton even. But his style was perfect for the music Metallica was making at the time.